Heavy-duty tricycle leaf spring pin lubrication structure

Abstract

The utility model relates to heavy load tricycle plate spring pin lubricating structure, including slotted nut and steel plate spring, plate spring iron bush inserts steel plate spring, plate spring pin inserts plate spring iron bush and is fixed by slotted nut, plate spring pin still include oil hole and pin cap, one end of plate spring pin connects pin cap, sets up threaded end at the other end, the pin cap center is provided with grease nipple, the grease nipple is connected to the grease cavity that is seted up inside plate spring pin, the one end away from grease nipple of grease cavity fixed mounting extrusion spring, extrusion spring pushes piston to one side of grease nipple, and the grease cavity is connected plate spring pin outer surface through oil hole, the utility model discloses that the grease cavity that can store lubricating oil is added to plate spring pin, and the piston is pushed out to the between plate spring iron bush and plate spring pin with grease from oil hole, make lubricating oil after continuous loss can not stop getting supplement, reduce friction resistance by the reduction of friction temperature of lubricating oil, thereby effectively prolongs the service life of plate spring pin, can effectively improve the ability of vehicle transportation goods.

Description

Technical Field

[0001] This utility model relates to a leaf spring pin, specifically a lubrication structure for a leaf spring pin of a heavy-duty tricycle. Background Technology

[0002] The function of a three-wheeled truck is to transport goods. The weight of the goods and the truck body is transmitted to the leaf springs via leaf spring pins. The leaf springs compress and rebound as the vehicle travels, causing relative movement between the leaf spring coil and the leaf spring pin, generating friction. If lubrication is not provided in time when friction occurs, it will lead to accelerated wear, damaging the leaf springs and leaf spring pins, causing excessive wear on the leaf spring pins, increasing the gap between the leaf spring and the frame, making the vehicle unstable, and thus unable to complete the transport.

[0003] Currently, a utility model patent with publication number CN204712813U discloses a leaf spring pin for a heavy-duty truck. The first end face of the leaf spring pin body is provided with a disassembly groove, located at the inlet end of the oil inlet channel of the leaf spring pin. A receiving space is provided at one end of the leaf spring pin body near the inlet end, extending axially from the first end face along the leaf spring pin body. A grease nozzle connected to the inlet end is placed within the receiving space. This technical solution, by providing the disassembly groove, allows the end of a disassembly tool to be placed within it. By rotating the disassembly tool, the leaf spring pin is rotated, causing it to slowly disengage from the leaf spring bushing, thus reducing damage during disassembly. Simultaneously, the receiving space provides clearance for the grease nozzle, protecting it from impact and reducing the risk of failure.

[0004] As can be seen from the above-disclosed technical content, as prior art, the utility model with announcement number CN204712813U, by setting a disassembly groove, allows the end of the disassembler to be placed in the disassembly groove, and by rotating the disassembler and driving the leaf spring pin to rotate, it can be slowly dislodged from the leaf spring bushing, thereby reducing damage to the leaf spring pin during disassembly. However, this patent is mainly for the convenience of disassembling the leaf spring pin. Although the oil outlet on it can add lubricating oil externally, it does not have built-in power. After the lubricating oil between the pin and the bushing is consumed, it still needs to be added externally with a grease gun, which requires frequent maintenance and is not very convenient to use. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a lubrication structure for leaf spring pins of heavy-duty tricycles, which can extend the service life of leaf spring pins, reduce wear on leaf spring pins, and effectively improve the vehicle's ability to transport goods.

[0006] To achieve the above objectives, this utility model provides a lubrication structure for a leaf spring pin in a heavy-duty tricycle, comprising a slotted nut and a leaf spring. A leaf spring bushing is inserted into the leaf spring, and the leaf spring pin is inserted into the leaf spring bushing and fixed by the slotted nut. The leaf spring pin also includes an oil outlet and a pin cap. One end of the leaf spring pin is connected to the pin cap, and the other end has a threaded end. A grease nipple is formed at the center of the pin cap and connected to a grease cavity inside the leaf spring pin. A compression spring is fixedly installed at the end of the grease cavity away from the grease nipple, pushing the piston towards one side of the grease nipple. The grease cavity communicates with the outer surface of the leaf spring pin through the oil outlet, and a limiting ring is provided near the oil outlet. The grease nipple has a built-in check valve.

[0007] In addition, the heavy-duty tricycle leaf spring pin lubrication structure proposed in the above embodiments of this utility model may also have the following additional technical features:

[0008] As a further improvement of this utility model, the outer end of the grease nipple is equipped with threads, and the sealing screw is screwed onto the grease nipple.

[0009] As a further improvement of this utility model, the leaf spring pin is equipped with two or three oil outlet holes.

[0010] As a further improvement of this utility model, the compression spring can be replaced with compressed air.

[0011] As a further improvement of this utility model, the diameter of the oil outlet hole is larger on the outside and smaller on the inside.

[0012] By means of the above solution, the present invention has at least the following advantages: by adding a grease chamber for storing lubricating oil to the leaf spring pin, and cooperating with the piston to push the grease from the oil outlet to between the leaf spring bushing and the leaf spring pin, the lubricating oil can be continuously replenished after continuous consumption. The lubricating oil reduces the friction temperature and friction resistance, thereby effectively extending the service life of the leaf spring pin and effectively improving the vehicle's ability to transport goods. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the leaf spring pin lubrication structure of a heavy-duty tricycle;

[0014] Figure 2 This is an exploded view of the leaf spring pin lubrication structure of a heavy-duty tricycle;

[0015] Figure 3 This is a cross-sectional view of the leaf spring pin in the lubrication structure of a heavy-duty tricycle leaf spring pin.

[0016] Figure 4 This is a schematic diagram showing the usage status of the leaf spring pin lubrication structure of a heavy-duty tricycle;

[0017] In the diagram: 1. Slotted nut, 2. Leaf spring bushing, 3. Leaf spring pin, 31. Threaded end, 32. Oil outlet, 33. Pin cap, 34. Grease nipple, 35. Check valve, 36. Grease chamber, 37. Limiting ring, 38. Piston, 39. Compression spring, 4. Leaf spring. Detailed Implementation

[0018] The lubrication structure of the leaf spring pin of this utility model for heavy-duty tricycles is described below with reference to the accompanying drawings.

[0019] In Embodiment 1 of this application, as Figures 1 to 3 As shown, the leaf spring pin lubrication structure of this heavy-duty tricycle (hereinafter referred to as "the present invention") includes a slotted nut 1, a leaf spring bushing 2, and a leaf spring 4. The leaf spring bushing 2 is inserted into the leaf spring 4, and the leaf spring pin 3 is inserted into the leaf spring bushing 2 and fixed by the slotted nut 1. The leaf spring pin 3 also includes an oil outlet hole 32 and a pin cap 33. One end of the leaf spring pin 3 is connected to the pin cap 33, and the other end is provided with a threaded end 31. A grease nipple 34 is opened in the center of the pin cap 33. The grease nipple 34 is connected to a grease cavity 36 opened inside the leaf spring pin 3. A compression spring 39 is fixedly installed at the end of the grease cavity 36 away from the grease nipple 34. The compression spring 39 pushes the piston 38 to one side of the grease nipple 34. The grease cavity 36 is connected to the outer surface of the leaf spring pin 3 through the oil outlet hole 32. A limiting ring 37 is provided near the oil outlet hole 32. The grease nipple 34 has a built-in check valve 35.

[0020] The utility model patent CN204712813U describes a leaf spring pin for a heavy-duty truck (hereinafter referred to as "the patent"). This patent features a disassembly groove, allowing the end of a disassembler to be placed inside. By rotating the disassembler, the leaf spring pin is rotated, causing it to slowly disengage from the leaf spring bushing, thus reducing damage during disassembly. However, this patent primarily aims to facilitate leaf spring pin disassembly. Although the oil outlet allows for external lubrication, it lacks internal power. Once the lubricating oil between the pin and bushing is depleted, it still requires external grease gun refilling, necessitating frequent maintenance and making it inconvenient to use. In contrast, this invention adds a grease chamber 36 to the leaf spring pin 3 to store lubricating oil. With the help of a piston 38, grease is pushed from the oil outlet 32 ​​between the leaf spring bushing 2 and the leaf spring pin 3, ensuring continuous replenishment of lubricating oil as it is consumed. The lubricating oil reduces frictional temperature and frictional resistance, effectively extending the service life of the leaf spring pin.

[0021] This second embodiment is basically the same in structure as the first embodiment, the difference being that, as Figure 3 As shown, the outer end of the grease nipple 34 is equipped with threads, and the sealing screw is screwed onto the grease nipple 34 to further seal the grease nipple 34, prevent external dust from entering the grease nipple 34, and prevent lubricating oil from overflowing.

[0022] To further optimize the working efficiency of this application, and to allow the lubricating oil to enter more evenly between the leaf spring bushing 2 and the leaf spring pin 3, the leaf spring pin 3 is equipped with two or three oil outlet holes 32. To reduce costs, the compression spring 39 can be replaced with compressed air, which pushes the piston 38 to expel the lubricating oil into the grease chamber 36. To allow the lubricating oil to be better coated on the leaf spring bushing 2, the diameter of the oil outlet holes 32 is larger on the outside and smaller on the inside, increasing the contact area between the lubricating oil and the inner surface of the leaf spring bushing 2, thereby improving the lubrication effect.

[0023] Once the heavy-duty tricycle leaf spring pin lubrication structure is installed, the equipment can be put into use.

[0024] When this utility model is used, its specific operation is as follows:

[0025] In use, align the grease gun nozzle with the grease nipple 34 and press firmly to squeeze grease into the nozzle 34. The grease will then pass through the check valve 35 and enter the grease chamber 36. Continuing to inject grease, the grease first soaks into the space between the leaf spring bushing 2 and the leaf spring pin 3 through the oil outlet 32. Then, due to the obstruction of the slotted nut 1 and the pin cap 33, the grease soaking speed decreases. Continuing to inject grease at this point will push the piston 38 and compress the spring 39. After injecting a certain amount, detach the grease gun from the nozzle 34. Due to the obstruction of the check valve 35, the slotted nut 1, and the pin cap 33, the grease will stop overflowing. At this point, the grease nipple 34 can be sealed with a screw.

[0026] During use, the compression spring 39 and piston 38 continuously apply pressure to the grease in the grease chamber 36, causing the grease to slowly overflow from the grease outlet 32. Since the compression spring 39 itself has low pressure, the grease is consumed slowly.

[0027] Since the grease itself is constantly overflowing, the force of the compression spring 39 can be controlled by a screw to prevent the grease from overflowing too quickly or not overflowing at all. Specifically, a screw hole is started on the axis of the threaded end 31 of the leaf spring pin 3 to connect to the grease cavity 36. Then, a screw is screwed into the screw hole, and the screw presses against the compression spring 39. The pressure of the compression spring 39 is controlled by adjusting the length of the screw extending into the leaf spring pin 3, so as to ensure that the grease cavity 36 can store lubricating oil and that the lubricating oil is smoothly and slowly pressed into the space between the leaf spring bushing 2 and the leaf spring pin 3.

[0028] In summary, the heavy-duty tricycle leaf spring pin lubrication structure of this utility model adds a grease chamber 36 to the leaf spring pin 3 to store lubricating oil. With the help of the piston 38, the grease is pushed out from the oil outlet 32 ​​to the space between the leaf spring bushing 2 and the leaf spring pin 3. This allows the lubricating oil to be continuously replenished after continuous consumption. The lubricating oil reduces the friction temperature and friction resistance, thereby effectively extending the service life of the leaf spring pin and improving the vehicle's ability to transport goods.

[0029] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A leaf spring pin lubrication structure for a heavy-duty tricycle, comprising a leaf spring bushing (2), a leaf spring pin (3), and a leaf spring (4), wherein the leaf spring bushing (2) is inserted into the leaf spring (4), and the leaf spring pin (3) is inserted into the leaf spring bushing (2) and fixed by a slotted nut (1), characterized in that, The leaf spring pin (3) also includes an oil outlet hole (32) and a pin cap (33). One end of the leaf spring pin (3) is connected to the pin cap (33), and the other end is provided with a threaded end (31). A grease nipple (34) is opened in the center of the pin cap (33). The grease nipple (34) is connected to a grease cavity (36) opened inside the leaf spring pin (3). A compression spring (39) is fixedly installed at the end of the grease cavity (36) away from the grease nipple (34). The compression spring (39) pushes the piston (38) toward one side of the grease nipple (34). The grease cavity (36) is connected to the outer surface of the leaf spring pin (3) through the oil outlet hole (32). A limiting ring (37) is provided near the oil outlet hole (32). The grease nipple (34) has a built-in check valve (35).

2. The heavy-duty tricycle leaf spring pin lubrication structure according to claim 1, characterized in that, The outer end of the grease nipple (34) is threaded, and the sealing screw is screwed onto the grease nipple (34).

3. The heavy-duty tricycle leaf spring pin lubrication structure according to claim 2, characterized in that, The leaf spring pin (3) is equipped with two or three oil outlet holes (32).

4. The heavy-duty tricycle leaf spring pin lubrication structure according to claim 1, characterized in that, The compression spring (39) can be replaced with compressed air.

5. The heavy-duty tricycle leaf spring pin lubrication structure according to claim 4, characterized in that, The diameter of the oil outlet hole (32) is larger on the outside and smaller on the inside.

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